Mining apparatus



March 5, 1929 M. P. HOLMES MINING APPARATUS Original Filed Dec. 26, 1919 2 Sheets-Sheet L March 5, 1929. M. P. HOLMES MINING APPARATUS Original Filed De. 26, 1919 2 Sheets-Sheet Patented Mar. 5, 1929.

UNITED sraras rarsar crates.

MORRIS P. HOLMES, 0F CLABEMONT, lil'lilV-T HAMPSHIRE, ASSIGNOR TO SULLIVAN MA- CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

MINING APPARArus;

Application filed December 26, 1919, Serial no; 347,571 Renewed June 18, 1928.-

My inventioj relates to mining apparatus.

It has for its object to provide an improved mining apparatus, and more especially an improved mining machine slidable on the mine bottom and especially adapted to low vein work on the room and pillar system. A further object of my invention is to provide an improved machine, adapted to different types of cutting when desired, and more especially readily convertible at will to adapt it to either longwall or, room-and-pillar cutting, i. e. to cutting with the bar laterally disposed relative to its frame as the latter moves along a face or with the bar longitudinally disposed relative to its frame as the latter moves along a face. A still further object of my invention is to provide improved means whereby a mining machine may be made capable of use When desired as either a longwall or room-and-pillar machine. y

In the accompanying drawings, I have shown for purposes of illustration one embodiment which my invention may assume in practice.

In these drawings, Fig. l is a simplified plan view of a mining machine equipped with my improvement.

Fig. 2 is a detail frontelevation showing my improved feed member guiding means.

Fig. 3 is a sectional view of the same taken on line 33 of Fig. 1. l i

Fig. 4 is a side elevation of the same, parts being broken away to facilitate illustration.

Fig. 5 is a diagrammatic view showing the apparatus in use as a room-and-pillar 'machine, the machine frame being shown in a plurality of positions. 7

Fig. 6 is a diagrammatic view of the apparatus in use as a longwall machine.

Fig. 7 is a side elevation of the front end of the recedingside of the machine shown in full lines in Fig. 5. V

Fig. 8 is a side elevation of the front end of the advancing side of the same. 7

In this illustrative construction I have shown a mining machine of a well known longwall type, described and claimed in my copending application Ser. No. 130,579, filed Nov. 10, 1916, the same herein (Fig. 1) including a low frame 1 slidable on its bottom on a mine bottom and carrying at one end a usual motor driven feed operating member 2 adapted to cooperate with a flexible feeding member 8, and at its opposite end a cutter bar 4 disposed substantially on the mine bottom and pivoted at 5 on the frame land I a front head 6 and having a cutter chain7 movable therearound and driven from the intermediate motor M in a Well known manner; this machine being provided with im proved means hereinafter described whereby ting when desired. I

In my improvedconstruction, a feed guide support member 8 1s fixed to the front end the same is adapted to room-andpillarc'ut of the frame 1 near the rear end of the cutter bar 4 (Fig. 1), the same herein being car- I ried upon the head 6 and provided with flanges 9 and 10 adapted to fit over the edge of the head and be clamped thereto by any suitable means. as for instance'by a vertical erally extending spaced arms 14 which are disposed vertically on its side, and have pivotally mounted between the upper endsof the same, as on a pivot pin 15. a swinging guide carrying member 16. This member 16 is in turn preferably also provided on its free end with a longitudinallydis posed stud .17'of' reduced cross section and located near the bottom in such a location as to form a suitable bearing for a rotatable guide member 18. This member 18 may be of any suitable form adapted to cooperate with any suitable type of flexible feed mem her, and is herein for illustrative purposes shown in the form of a chain sprocket adapted to'cooperate with a flexible feed chain. As shown, a suitable bushing 19, herein of transversely divided, two-part, removable construction, is also disposed between the member 18 and the stud, both the members 18 and 19 being held in position between the washer 20 and the larger lower end of the member 17 by suitable means, such as a bolt 21. i

In order that the pivoted member 16 may be suitably retained in. its operative position, I have found it necessary to provide means for rigidly connecting the same to the member 8. These means may obviously assume various forms, although they'are preferably of a type which may be readily connected or dis:

connected at will, as in room-and-pillar mining it is desirable for the member 16 at different times to be swung into an upright position above its pivot or to beheld definitely in the fixed relation with r spect to the member 8 andthe machine shown in Fi 3. Here'- in, these means include a pin 22 movable longitudinally through suitable cooperating apertures in the arms 14 of the member 8 and in the lower portion of the member 16, the pin preferably assingthrough the parts at a point wel below the pivot 15 and above the stud 17. More specifically, it will be observed thatlherein this pin has one reduced end 23 receivable ina correspondingly shaped aperture 24 in the right hand member 14 a section of larger diameter 25 receivable in a correspondingly shaped slightly facility by simply pulling; the pin to the le 'the, arm 14 in question. suitable interlocking means are also provided between the pin and one of the members 14-, 16, as for instance by rovlding a ball 33 carried by the latter member and normally projected by a spring S l into the groove 27.

Thus, it will be observed that itis made possible for an operator to release the parts with ft of the position shown in 4 until the p01 lion n3 thereof clears the aperture 24?: and the body portion of the pin at the left of the groove 2? is brought into the aperture 30 and then simply swinging the member 16 about its pivot, the pin then moving freely through the openingsll, 32. It will also be observed th at,

conversely, i. e. when the member 16 is moved back toward operative position with the pin 22' intho same position, the member 16 will drop into the position shown in Fig. 3, so that, by simply pushing in the pin, the operator may lock the parts 14 and 16 together,'the spring pressed ball 38 thereupon also automatically nine; the groove 27 to prevent accidental longitudinal movement ot the pin.

It has also been found desirable to provide means for preventing conflict between the flexiblc feed member 3 and the cutter chain 7 as the path of the latter is closely adjacent the member 3, when that member is passed around the member 18. These means may likewise assumeyarious forms, being carried upon either the machine or the member 8. As the former disposition, however, ordinarily requires another separate removable attachment ,whiclifiwould have to be removed during certain operations of the machine, I

preferably provide these means upon the of a downwardly extendingguard or flange .35 formed on the lower lange 10 and so shaped on its opposite sides as to provide a substantial seat for the threaded end of the bolt 11 and a maximum clearance for both the cutter chain 7 and the feed chain 3 without objectionably interfering with the cuttings.

Attention is further directed to the fact that in'order that the rotatable guiding member 18 nniy' bereadily lubricated, I have herein provided a lubricant pocket 36' adapted to be closed by a suitable plug 37 in the lower part of the member 16 and at one side of the pin 22,

the pocket 36 being extended diagonally downward and provided with a communicatbore 38 of reduced cross section leading down into the stud 17 and having alateral port 39 extending to the periphery ofthe stud' Referring again to the mining machine proper, it will be observed that the bar there-- inabovc described as pivoted at 5 to the frame 1,1s adapted to be held ri 'idlyin. a plurality of different angular relations to the frame in a well known manner, both the bar and the head 6 being provided with perforations 40 adapted to register when thebar is in different angular positions and to receive a locking pin 4311', three of these perforations hereinbeing shown in the head disposed'in front and on the opposite sides of the pivot 5 and one in the bar, as in a well known arrangement.

l-lerein, it will be noted that the sleeve 12 is shown to be conveniently disposed in one of the perforations 1O in the head 6, although obviously separate provision may be made to. receive this sleeve. As a result of this angularly adjustable bar construction, it will be evident that the bar 1 and frame 1 may be locked in the longitudinally disposed relation shown in Fig. 1 in such a manner as toform in eifect a'rigid room-and-pillar machine, or the bar may, if desired, be locked in the oppoitely disposed angular relations usual in longwall mining, herein shown in Fig. 6, to form a longwall machine, my improvement making it possible for the machine to be fed by its flexible feeding member when the parts are in either relation mentioned, and there' fore adapting the machine to either longwall orrooin-and-pillar cutting. Attention is also directed to the fact that I have herein provided a plurality of supplemental apertures 42 in the head 6, two being shown herein, which supplemental apertures are also adapted to receive the pintl when the apertures 42 in the head and the aperture 4:0 in the bar are brought into registry, this last mentioned feature having decided advantages in room and-pillar cutting under bad roof conditions,

as hereinafter described.

In the use of my lmproved construction,

during continuous right or left hand longwall cutting in whichthe'bar is disposed at Liv the right or left, respectively, of the frame, my improved guiding means may be carried in the unused side holes onthe opposite side of the head, the same then in no way conflicting with theangular movement of the parts. When, however, it is desired to utilize the machine as a room-,and-pillar machine, the bar 4 is then locked by the pin 41 in the longitudinal position shown in Fig. 1, and my improved guiding device is inserted in the side opening 10 on the side adjacent the rib toward which the cut is to be made. During sumping, thefiexible feed member 3 may accordingly be passed down between the frame and the rotatable guiding member 18 and connected to the face, the machine then being sumped in a well known manner, as the feed operating member 2 is rotated, the meme ber 18 duringthis operation acting as an effective guide CllSPOSQ'Cl close to the bottom.

During transverse cutting, the flexible feed member 3 may also have one end passed lat-- erally around the member 18 to a jack adja' cent the rib mentioned, while the other end of the flexible feed member may be passed in an opposite direction from the feed operating member to the opposite rib, to which it is connected by any suitable usual means, such as a ack or take-up, the machine then operating as a usual room-and-pilla-r machine. By inserting my improved guiding device in the left hand opening 40 (Fig. 5) and inserting the bar pin 41 in the right hand opening 42, as shown in that figure, it will also be noted that it is possible to reduce the length of the converted machine when necessary, and thereby reduce the area which must be left clear of props. More particularly, by this arrangement it will be observed that it is possible to angle the frame 1 relative to the bar and yet operate the machine as a room-anchpillar ma chine, the angular position of the frame relative to the bar then bringing in the .rear end of the frame so much more closely to the face as to permit of the props being placed a substantial distance closer to the machine, a feature of decided importance when operating under bad roof conditions. Obviously, through the provision of the plurality of openings 42 this feature may be used in cutting on either side, as desired.

As a result of my improved construction,

it will be observed that it is made possible to utilize a single machine for either long-' wall or roomand-pillar cutting, orvice versa.

More particularly, it will be noted that the same enables advantage to be taken of the lower construction usually embodied in a longwall machine. in such a manner as to enable low vein work to be cut on the room and pillar system. It will also be observed that with my improved construction it is made possible to cut on this latter system in low vein work and under ,bad roof conditions requiring propping closely adjacent the face,

the an lin of the machine frame in Hi improved construction enabling a longwall machine to cut on tie room-and-pillar princple in as small a space as a materially shorter machine. At the same time, attention is directed to the fact that my improved converting. means is of a simple and rugged type which may be readily constructed and'applied to standard machines at small expense andwith- Y,

out material change therein. The same is also of such a construction that it in no .way interferes with right or left hand use of the cutting apparatus in cutting of'eit-her type, the guiding device in View of its'reversible mounting being adapted to be disposed read-'- ily in a noneonfhctmg position, and even requiring no change in certain cutting, as" for instance where the conditions require. room-.v

and-pillar cut-ting from. right to left and consecutive right and longwall cutting 5 and 6), or vice versa. i

While I have in this application specifically described one embodiment which my invention may assume inpractice, it will be understood that this form of the same is shown for illustrative purposes and that the invention may be modified and embodied in various other forms without departing from its spirit or'the scope of the appended claims.

lVhat I claim new and desire to secureby Letters Patent is:

1. The combination with a mining machine slidable on a mine bottom and having. a motor thereon and a longitudinally extending cutter chain carrying cutter bar thereon disposed substantially on the mine bottom and having its rear end in front of said motor with the orbit of the chain wholly in front of the motor, of means for feeding said machine latera'lly including flexible feeding portions acting laterally on the opposite ends of said machine and having its advance portion act- (Figs,

ing in a plane between the mine bottom and the top of said ban,

2. The combination with a mining machine slidable on a mine bottom and havinga motor hereon and a longitudinally extending cutter chain carrying cutter bar thereon disposed ing substantially in the plane of said cutter bar. t

3. The combination with a mining machine slidable on a mine bottom and having a motor thereon and a longitudinally extendingcutfer bar thereon disposed substantially on the mine bottomuand having its rear end in front of said motor with the orbit of the chain wholly in front of the motor, of flexible feeding means acting laterallyon the "opposite substantially on the mine bottom an l .its rear end in front 0t said mo or wits the.

- an element of said feed'n;

" outlet on the opposite side of.

thereon and a longitud,

/ its rear end in front 'orbit of the chain wholly in motor, of means fort 1 ends thereof includin wide means thereon and a cutter chain o ends of disposed ad acent the front end of said machine. and means carr ed by said frame formmg ail-abutment between said cutter bar and said guide While permitting; a free egress of cutt ngs from said bar. 7

4. The combination with a nrinmg machin slidable on a mine bottom including a motor thereon and a longi it'ulinally extol ding; cutter chain carrying cu .ter bar thereon (ilSPOSGd orbit of the chain wholly in i motor, of flexible feeding means ac orally on the opposite ends of sai d nm and means presenting an abutment be" icans audsai d bar and a cutt said bar from s d abutment. 5. The com nation with a in l slidable on a mine bottom and chain carrying critter substantially on the m (r erally in opposite directions posits ends thereof inciudir. operative in either dircctiei r. posed on said machine adj acent one of and substantially in a plane be ween mine bottom and the top of said bar.

6. The combination with a mining machine slidable on a mine bottom and. ha lllfl a motor thereon and a longitudii ally exte cutter chain carryingcutter bar thereon. substantially on the mine bottom and its rear end in. front of said motor with. the orbit of the chain wholly in front of the motor, of means for feeding said machine laterally in opposite direct-ions acting; on the opposite h operative in either directionof-feed and disposed on said machine adjacent one end thereof and substantially in the plane of said bar, and

ll I) spacing means between said guide mei'nber and bar likewise operative in either direction of feed.

7 The combination of-a mining machine slidable on a mine bottom including a motor bar thereon tern'linatin in advance of said motor with the orbit of the chain wholly-in front of the motor, of means for disposing:

said bar in fixed positions longitudinallv and transversely of said machine, and l'llmlblQ feeding; means including a feed portion acting longitudinally of said machine when said bar is transversely disposed and a pluralityof feeding portions acting}; on the opposite ends of said machine withv its advance DOIL'iJlOIl 7 acting in a plane between the ine bottom.

and the top of said bar when the late is longitudmally disposed,

said machine including a feed guide 3. avin yingr cutter 8. In a mining apparatus, af-longwall machine comprising laterally disposed cutting means and flexible traction feeding means, and means whereby said machine may be converted into a room-and-pillar machine with said cutting mechanism longitudinally disposed and said flexible traction feeding means in the plane of said cutting means.

9.111 a mining apparatus,'a room-andpilh machine having longitudinally disp-osed cutting means thereon and feeding means comprising a tlti zible traction member disposable s .bstantially in the same plane as said cut-ting means, and means whereby said n ichine may be converted into a longwallmachine with its cutting means laterally disposed. Y

10. In a mining aoparatus, a frame slidable'on its bottom the mine bottom, cutter 'sin coi'i'iprising cutter bar projectin;; therefrom at one end thereof, flexiblefeeding: means having advance and receding l lc f up; portions extending inopposite directions from the opposite ends of are 'i' rame, rotate le f ed operating'mea'ns on said frame adjac "e other end thereof and cooper: ing with s id feeding means whereby said 1 portionsmay-be drawn in by power, a means whereby said cutter bar may be i l laterally or longitudinally said olefeeding means may be 'ree ed for longwall and for room-and-pillar end'of said motor remote from said cutter bar.

and cooperating with said flexible feeding means whereby said feeding portions may be drawn in by power, and means whereby said cutter bar may be disposed laterally or long tudinally'and said flexible feeding means may be reeved for longwall or room-and-pillar cutting r spectively.

- -12. In a minin a )aratus a room-and u a I L plllarmachine siidable on the mine bottom during cutting and including an elongated frame and a relatively movable cutter bar, means for reversibly relatively angularly disposing said elements, and means including oppositely extending flexible portions acting laterally on the opposite ends ofsaid elongated frame for feeding and guiding the machine laterally along a face'whe'nthe elements thereof are so disposed.

13. In a mining apparatus, a mining machine having a pivoted cutter bar, means for fining the latter difierent angular relations the latter and a feed member 'uidi'n member 7 i b b disposable in certain of said apertures.

' 15. In a mining apparatus, a longwall machine having a pivoted cutter bar, and means for positioning the latter for right or left hand cutting including a plurality of apertures in said machine, and a feed .member guiding member disposable'in different ones of said apertures.

16. In a mining apparatus, a machine having a pivoted cutter bar, means for positioning the latter in difierent positions including a pluralityof apertures adjacent the'bar pivot, and a feed member guiding'member' disposable in one of said apertures.

17. In a mining machine, a machine frame, a pivoted cutter bar thereon, means for posi-' tioning said bar in difierent anguiarrelations .including a series of apertures adjacent the bar pivot, and a feed member guiding member disposable in any of a plurality of said apertures.

18. In a mining apparatus, a mining machine having a pivoted cutter bar, means for positioning the latter in a plurality of angular relations with said machine including a longitudinally disposed relation, a feed member guiding member carried on said machine adjacent the bar pivot and also adjustable to a plurality of positions, and flexible lateral feeding means including power operated and controlled flexible portions acting transversely of the opposite ends of said machine and one engaging said guiding member when said bar is longitudinally disposed.

19. Ina mining apparatus, a mining machine having a pivoted cutter bar, means for positioning the latter in a plurality of angular positions, a feed member guiding-member, and means for disposing the same adjacent the bar and in positions on opposite sides of the bar pivot but in the planeof said bar. 7

20. In a mining machine, a machine frame,

a pivotedcutter bar thereon, means forpositioiiing said barin different angular positions including a series of apertures located cir cumferentially around the bar pivot, and a feed member guiding member, disposable in one of said apertures.

21. In a mining machine, a frame, a cutterg bar pivoted thereon,.means forpositioning the latter in a plurality of angular relations,

a feed member guiding member carried on said frame ad acent the pivotof said bar and substantially in the same plane with saidbar, and a 'guard between said member and bar. 7

22. In a mining machine, a frame, a cutter bar pivoted tliereon,rmeans for pos tioningthe latter in a plurality of angular relations,

a feed member guiding (member carried on said frame adjacent the pivot of said bar, and

a guard carried bv said member and disposed between the latter andsaid bar.

23. In a mining mach ne, a frame, apivoted bar thereon, meansfor positioningthe latter in different angular relations including a plu-' rality of apertures in said frame, a cooperating removable feed member guiding member supported in anuni'ised aperture, and remov able guard means disposed between said member and said bar.

24. In a mining apparatus, a feed member guiding member comprising a supporting.

member adapted to be attached to a machine frame, a pivoted guide carrying member on said supporting member, a guide member iotatably mounted on the latter, and meansfori 1 releasably connecting said support and swing-f 'ing member.

25. In a mining apparatus, a feed member 1 j I guid ng member comprising a supporting member adapted to be attached to a machine frame, a pivoted guide carrying member on said supporting member, a guide member r0 tatably mountedfon the latterya pin/extends ing through said support and swinging member, and means on saidpin and support for releasing said pivoted memberupona partial withdrawal of said pin; f

26. Ina mining apparatus, a feed member" guiding member comprising a supporting member adapted to be attached to a machine" frame, a pivoted guide carryingmembeiga guide member rotatably mounted onthe latter, a pin extending through said support and swinging memb-er,means onsaid pin and sup,-

port for releasing said pivoted member upon a partial withdrawal of said pim and 11162111 8.

acting between said pin and one of saidmembers for inhibiting accidental longitudinal pin noyemeiit. V g Y Y I 27. In a. mining machine, a feed member guide supporting 'member havi'ng' a flange provided with a depending guard thereon, a swinging guide carrying member pivoted on said supporting member, a rotary guide member ournaledon said swinging member and disposable in one position spaced apart from but ad acent said depending guard, andresaid position.

126" leasible means for securing the elements in 28. In a mining machine, a feed member guide. supporting member having spaced 1 thereon, means for'clainp ii '-.sa1d.flanges toa flanges, one provided with a depending guard support, a swinging guide carrying member pivoted on said supporting member, a rotary guide member journaled on said swinging member and disposable in one position spaced 'gu'iding member comprising a supporting apart from but adjacent said depending guard, and releasable means for securing the elementsin said position.

29. In a mlning apparatus, a feed member guiding member comprising a supporting 'inemb'er adapted to be attached to a machine frame, apivoted guide carrying member depending-from itspivotwhen in operative position and movable'upward into an inoperative position, a guide member mounted, on

the latter androtatable about an axis sub stantially T perpendicular to said pivot, and means for releasably connectingsaid support and pivot member.

30. In a mining apparatus, a feed member member adapted to be attached to a machine frame, a pivoted guide carrying member depending fromits pivot and movable upward into inoperative position, a guide member mounted on thelatter and rotatable about an axis substantially perpendicular to said pivot,

and means acting adjacent the free end of said guide carrying" member fo1."releasably connecting said support and member.

1 31. In a mining apparatus, a feed member guiding member comprising a supporting member adapted to be attached to a machine frame, a pivoted guide carryingmember, a guide member mounted on the latter and r0- tatableabout an .axis substantially perpendicular to said-pivot, and a cooperating guard carried on said supporting member and dis posed adjacent said guide member. I

32. The combination with a mining machine'slidable on a mine bottom and having a motor thereon and a cutter chaincarrying cutter bar disposedsubstantially on the mine bottom and so disposed that its projection and that of said motor on the mine bottom do not overlap and pivotable about an axis between 1ts ends, and means for holding the same in positions at an angle to or n allneinent with the major dimension of said mining machine,

ofmeans for feedingsaid machine to effect cutting with said .bar in either of sa1d pos1- tions including when said bar 1's in the last mentioned position flexible feeding portions acting laterally on the opposite ends of the .machine body of which said advance portion acts ina' plane between the mine bottom and the top of the bar. p

33. Ihe combination with a mining ma chine slidable on a mine bottom and having a motor thereon and a cutter chain carrying cutter bar disposed substantially on the mine bottom and so disposed that its projection and that o f-said motor on the mine, bottom do not overlap and pivotable about an axis between its ends, and means for holding the.

same in positions at an angle to or in alinement with the ma or dimension of said mming machine,'of meansfor feeding said ;ma-

chine to effect cutting with said bar in either of said positions including when said bar is in the last mentioned position flexible feeding portions acting laterally on the opposite ends of the machine body of which said ad.- vance portion acts substantially in the plane of the cutter bar. I I I 34. In a mining apparatus, a frame, cutting mechanism comprising a cutter bar project ing from one end thereof, a flexible feeding means, rotatable feed operating means on said frame and cooperating with said fecdin means, and means whereby said cutter bar maybe disposed laterally or longitudinally and said flexible feeding means may be reeved for longwall and room and pillar cutting respective'ly With the portion ofsaid flexible. feeding means in advance of said machine I lying substantially in the plane of said bar.

positely extending flexible portions acting laterallyon the opposite ends of said 'elongated machine for feeding and guiding the machine laterally along the face when the elements thereofare so disposed.

86. In a mining apparatus, a room andpillar mining machine adapted to cut in either i direction across a face and includingvan elongated frame and'a relatively movable cutter bar means forrelativel an 'ularl dis o'sin 3 b b said elements and flxing'th em in such relation that said machine frame may make the same angle with the portion of the face in advance thereof in either direction of travel, and means including oppositely extending flexible portions acting laterally on the opposite ends of said elongated frame for feeding and guid ing the machine laterally along the face when theelements thereof are so disposed.

37. In a mining apparatus,a feed member guiding member comprising a supporting member adapted to be attached to a machine frame in a pluralityof different positions, a

pivoted guide carrying member, a guide memberinount'ed on the latter and rotatable about an axis substantially perpendicular to said pivot, and means forreleasably connecting said support and pivoted member.

38. In a mining apparatus,.a feed member guiding member comprising a supporting member adapted to be attached to a machine frame at either side thereof, a pivoted guide carrying member, guide member, mounted on the latter and rotatable about an'axis substantially perpendicular to said pivot, and means for releasably connecting said support and pivoted member. 7 v I 39. In a mining apparatus, a feed member guiding member comprising a supporting member adapted to be attached to a machine frame, a guide carrying member pivoted on said supporting member for movement relative to the latter resulting in a change in the angular relation of said guide carrying member to the maj or dimension of said supporting member, a guide member mounted on the pivoted guide carrying member and rotatable about an axis substantially perpendicular to said pivot, and means for releasably connecting said support and pivoted member.

40. In a mining apparatus, a feed member guiding member comprising a supporting member adapted to be attached to machine frame, a pivoted guide carrying member, a guide member mounted on the latter and rotatable about an axis substantially perpendicular to said pivot, and means for releasably connecting said support and pivoted member with the axis of said rotatable guide member disposed in a vertical plane passing through said pivot and below said pivot in said plane.'

41. In a mining machine of the type adapted to cut in opposite directions, machine frame slidable directly on its bottom on the mine bottom during operation of the machine, a horizontal motor carried thereby, reversible cutting mechanism driven by said motor including a horizontal plane cutter, chain carrying cutter bar pro ecting lengthwise of said frame during late 'al cutting and disposed substantially on the mine bottom, said motor and cutter bar being so disposed that the projections of said bar and motor do not overlap, the top and bottom plane surfaces of said bar lying in planes intersecting said motor, and means driven by said motor for, effecting feeding of the machine laterally to effect cutting in either direction including flexible feeding means having power operated and controlled advance and receding flexible feeding portions acting laterally on the oppositeends of said machine frame.

42. In a mining machine of the type adapted to cut in opposite directions, a frame slidable directly on its bottom on the mine bottom during operation of the machine, a horizontal motor carried thereby, the vertical'dnnenslon of said motor substantially determin ng the height of the machine,reversible cutting mechanism driven by said motor including a horizontal plane cutter chain carry ng cutter bar projecting lengthwise of said frame during lateral cutting and disposed substantially on the mine bottom, the top and bottom plane surfaces of said bar lying in planes intersecting said motor, and mechanism driven by said motor to effect feeding vof the machine laterally to effect cutting in either direction including power operated and controlled flexiblefeeding portions acting laterally on the opposite ends of said'machi'ne i for longwall cutting, or lengthwise thereof for room and pillar cutting, means for feeding the machine laterally to effect cutting with said bar in any of its positions including when said bar is disposed lengthwise of the machine, and means whereby the effective length of the machine may be varied dur- I ing lateral cutting, said feeding means including flexible feeding portions acting laterally on opposite ends of said frame in'any length thereof. r a

Tn testimony whereof I aflix my signature.

: "MORRIS r. HOLMES.

CERTIFICATE OF CORRECTION.

Patent No. 1,704, 665. Granted March 5, 1929, to

MORRIS P. HOLMES.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, line 59, before the word "motor" insert the word "horizontal"; page 3, line 85, for the word "and" read "hand"; and that the said Letters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of April, A. D. 1929.

M J. Moore, (Seal) Acting Commissioner of Patents.

DISCLAIMER 1,704,665.M0rris P. Holmes, Claremont, N. H. MINING APPARATUS.

dated March 5, 1929. Disclaimer filed January 9, 1943, by th Sullivan Machinery Company. Hereby enters this disclaimer to claim 13 in said specification. [Oficz'al Gazette February 2, 1943.]

Patent e asslgnee, 

